Structure and paint set

Abstract

A structure includes a surface coat layer of which the thickness on a bump such as a weld bead and a weld spatter or an edge portion, possibly formed on the surface of a base, is not greatly different from the thickness on a flat portion. The structure therefore has excellent properties including heat insulation properties and electrical insulation properties. The structure includes a base that is made of a metal and has a flat portion and at least one of a bump and an edge portion on a surface; and a surface coat layer covering the surface of the base, the surface coat layer including a first surface coat layer covering the flat portion and a second surface coat layer covering the at least one of a bump and an edge portion.

1 . A structure comprising:
 a base that is made of a metal and has a flat portion and at least one of a bump and an edge portion on a surface; and   a surface coat layer covering the surface of the base,   the surface coat layer including a first surface coat layer covering the flat portion and a second surface coat layer covering the at least one of a bump and an edge portion,   the first surface coat layer and the second surface coat layer being formed from an amorphous inorganic material and particles of a crystalline inorganic material,   the particles of the crystalline inorganic material in the second surface coat layer having an average particle size smaller than the particles of the crystalline inorganic material in the first surface coat layer.   
     
     
         2 . The structure according to  claim 1 ,
 wherein the particles of the crystalline inorganic material in the second surface coat layer have an average particle size of from 0.1 to 50 μm, and the particles of the crystalline inorganic material in the first surface coat layer have an average particle size of from 1 to 51 μm.   
     
     
         3 . The structure according to  claim 2 ,
 wherein the particles of the crystalline inorganic material in the second surface coat layer have an average particle size of from 0.1 to 10 μm.   
     
     
         4 . The structure according to  claim 1 ,
 wherein the crystalline inorganic material constitutes from 5% by weight to less than 20% by weight in the second surface coat layer.   
     
     
         5 . The structure according to  claim 1 ,
 wherein the crystalline inorganic material contains at least one selected from the group consisting of calcia, magnesia, ceria, alumina, and an oxide of a transition metal.   
     
     
         6 . The structure according to  claim 1 ,
 wherein the crystalline inorganic material contains at least one selected from the group consisting of α-alumina and yttria-stabilized zirconia.   
     
     
         7 . The structure according to  claim 1 ,
 wherein the amorphous inorganic material contains low melting glass that has a softening point of from 300° C. to 1000° C.   
     
     
         8 . The structure according to  claim 7 ,
 wherein the low melting glass contains at least one of barium glass, boron glass, strontium glass, alumina-silica glass, soda zinc glass, and soda barium glass.   
     
     
         9 . The structure according to  claim 1 ,
 wherein the bump is formed by at least one of a weld bead and a weld spatter.   
     
     
         10 . The structure according to  claim 1 ,
 wherein the structure has a thickness ratio of the second surface coat layer to the first surface coat layer ((second surface coat layer thickness)/(first surface coat layer thickness)) of from 0.4 to 1.3.   
     
     
         11 . A paint set comprising two paint compositions for forming a surface coat layer on a base that is made of a metal and has a flat portion and at least one of a bump and an edge portion on a surface,
 the paint set including a first paint composition for forming a first surface coat layer covering the flat portion and a second paint composition for forming a second surface coat layer covering the at least one of a bump and an edge portion,   the first paint composition and the second paint composition each being formed from an amorphous inorganic material and particles of a crystalline inorganic material,   the particles of the crystalline inorganic material in the second paint composition having an average particle size smaller than the particles of the crystalline inorganic material in the first paint composition.   
     
     
         12 . The paint set according to  claim 11 , wherein the particles of the crystalline inorganic material in the second paint composition have an average particle size of from 0.1 to 50 μm, and the particles of the crystalline inorganic material in the first paint composition have an average particle size of from 1 to 51 μm. 
     
     
         13 . The paint set according to  claim 12 ,
 wherein the particles of the crystalline inorganic material in the second paint composition have an average particle size of from 0.1 to 10 μm.   
     
     
         14 . The paint set according to  claim 11 ,
 wherein the crystalline inorganic material in the total amount of the amorphous inorganic material and the crystalline inorganic material in the second paint composition constitutes from 5% by weight to less than 20% by weight.   
     
     
         15 . The paint set according to  claim 11 ,
 wherein the crystalline inorganic material are at least one selected from the group consisting of calcia, magnesia, ceria, alumina, and an oxide of a transition metal.   
     
     
         16 . The paint set according to  claim 11 ,
 wherein the crystalline inorganic material contains at least one selected from the group consisting of α-alumina and yttria-stabilized zirconia.   
     
     
         17 . The paint set according to  claim 11 ,
 wherein the amorphous inorganic material contains low melting glass that has a softening point of 300° C. to 1000° C.   
     
     
         18 . The paint set according to  claim 17 ,
 wherein the low melting glass contains at least one of barium glass, boron glass, strontium glass, alumina-silica glass, soda zinc glass, and soda barium glass.